Scalable Synthesis of Organic Core/Shell Architectures toward Dual-Wavelength Optical Waveguides

Area of Science:

• Materials Chemistry
• Organic Photonics

Background:

• Organic core/shell heterostructures offer unique properties but face synthesis challenges due to difficulties in controlling nucleation and phase separation in cocrystal structures.
• Existing methods struggle to overcome homogeneous self-assembly driven by high chemical and structural compatibility.

Purpose of the Study:

• To develop a novel synthesis strategy for organic core/shell heterostructures by precisely regulating phase separation.
• To overcome limitations in controlling nucleation and phase separation in analogous cocrystal systems.

Main Methods:

• Achieved phase separation growth using an organic alloy interface layer.
• Employed dynamic visualization to capture intricate morphological evolution during synthesis.
• Finely regulated the nucleation process to circumvent homogeneous self-assembly.

Main Results:

• Successfully formed organic core/shell heterostructures with controlled morphology.
• Demonstrated dual-wavelength emission at 496 nm and 696 nm.
• Achieved a low optical loss coefficient of 0.092 dB/μm.

Conclusions:

• The developed methodology enables the formation of organic core/shell heterostructures by controlling phase separation via an organic alloy interface.
• This approach offers a scalable pathway for designing other conformational cocrystal heterostructure systems.
• Provides valuable insights for advancing the field of organic photonics.